... : 1, It made of stainless steel parts, stainless steel panel with groove, DC motor, imported diamond wheel.2, Suitable for PC,plastic ... ,glass lenses.3, Groove width: 0.65mm.4, Lens diameter: from 18 to 70mm ... plastic and glass lenses.7, Atuomatic chamfering speed quickly.8, With timing function(0 - 120seconds range).Parameter:Electric Voltage:220V/50Hz ...